Duplicating defect-tracer



' PATENTED PEB. 23, 1904.

E. M. SGHANTZ. DUPLIGATING DBPBGT HAGER. APPLIGATION FILED JULY 18,1903.

'E0 MODEL.

fnl/En faz/ UNITED STATES Patented February 23, 1904.

EDVIN M. SOHANIZ, OF ZMMERMAN, OHIO.

DUPLIGATING. DEFEGT-TRACER.

SPECIFICATION forming part of Letters Patent No. 753,005, dated February23, 1904,

Application led July 18, 1908. Serial No. 166,119. (No model.)

To LM whom it may con/cern.:

Be it known that I, EDWIN M. SCHANTZ, a citizen of the United States,residing at Zimmerman, Green county, State of Ohio, have invented acertain new and useful Duplicating Defect-Tracer; and I do declare thefollowing where such material is to be marked and subdivided for anypurpose-as, for instance, for subsequent cutting up in smaller pieces.It may be used in connection with a markingmachine patented to me onJuly 28, 1903, and which machine serves to mark the cuttinglines on woodor lumber where such lumber is to be subdivided and cut up in smallerpieces or so-called dimension stuff. If used in such connection, the useof this present device precedes the use of such marking-machine. Anadjustable marking-guide is used in said machine to guide a suitable-marking implement, pencil, or chalk while the same is held in the handand moved over the surface to be marked od. In 'adjusting suchmarking-guide due notice is taken of the presence of any defects in thelumber, like knot-holes, Worm-eaten spots, bark near the edges, 6to.,the object being to cut up the lumber to the best advantage and so as toentail the least waste in obtaining clear and perfect pieces, and themarking-lines are arranged and run accordingly. When lumber has to beclear and perfect only on one side, the marking of the cutting-lines lpresents no difficulty, since any defects present may be readilyobserved. When lumber has to be perfect and clear on both sides, notehas to be taken of defects on both sides, since the presence or absenceof a certain defect on one side is no indication that the same defect ispresent or absent on the other side. Thus a clear piece of lumber mighthave been marked off on one side, and yet on turning over it may befound defective on the other side, and therefore useless for theintended purpose. Wormeaten places or bark, for instance, might bepresent on one side only. Knot-holes might pass through the woodobliquely and come out on the other side on a different spot.

The leading object of this invention is therefore to present on one sidefor simultaneous observation all the defects in a board on its twosides, so that the marking-lines on which the lumber has to be cut maybe run intelligently on the one side under observation and with alldefects before the eye for due consideration. This is done substantiallyby representing, preferably by pencil or chalk line, the defects of oneside on the other, so that such other side shows all defects of bothsides of the board, its own defects appearing just as they are, Whilethose on the other side appear by imitation, being represented by saidlines. All defects on both sides are thus placed before the eye, and themarking-lines to indicate the cutting-lines may now be run accordinglyon the one side and so as to avoid all defects, no matter on what sidethey are. The implement whereby the defects on one side of the lumberare thus accurately and in the exact position represented on theotherside of the board forms the subject of this invention.

In the following specification, and particularly .pointed out in theclaims thereof, is found a full description of the implement, togetherwith its manner of use, parts, and construction, which latter is alsoillustrated in the accompanying drawings, in which- Figure I shows a topview ofthe implevment with a suitable support or table on which thematerial (lumber) rests while being handled. Fig. 2 is a verticalcross-section on lines 2 2 of Fig. l. Fig. 3 shows the upper part of afront view of the device as it ap-- pears in Fig. l. Fig. Li is anenlarged side view of the implement With parts in section. Fig. 5 is across-section of it on lines 5 5 of Fig. 4.

10 and ll are two marking-points, of which the latter should be of amaterial which in its use produces a line, such as is done byleadpencils, chalk, carbon, or any other prepared material. Point l0 maybe merely a steel- IOO . vices.

pointed tracer; but I prefer to have it of the same or a materialanalogous to point 11. These points directed toward each other arecarried at the outer end of two arms 12 and 13, to which they yaresecured by suitable holders 14 in a manner customary in such de- Thearms are each pivotally secured to a sliding head 15, which is fittedinto a boX 16, so as to be held therein in a position substantiallyhorizontal, but free to slide back and forth. This box is swiveled orpivotally mounted in a manner permitting it to be rotated in ahorizontal direction about a vertical axis, the arrangement being suchas to prevent any interference with the sliding adjustment of head 15.In detail this construction may be by means of apivot 17, mounted on abracket 18, and to which it is held by a nut 19. Friction-reducing balls21 may be interposed between box and bracket. Arms 12 and 13 areattached so as to be in a vertical plane one below the other, and theyare also connected to each other in a manner that if one is moved on itshinged connection the other one will also move, and this movement issuch that they will either approach each other or move apart. For suchpurpose I use links 22, hingedly connected to each arm, and of whicheach is also connected to a pushrod 23, which, with its inner part 24,is fitted into the sliding head 15, the same being for such purposepreferably in shape of ahollow tube. The inner part or end of thispush-rod is arranged `in a manner which prevents it from entirelyleaving head 15, which may be done in any suitable wayas, for instance,by enlarging said part 24 and by providing a stop or shoulder 25 at theouter end of head 15, which prevents said enlarged part from passingout. Behind this enlarged part 24 there is a spring 26, which by bearingagainst the inner end of push-rod 23 keeps the same in a position as farout as the enlarged part 24 permits, thereby holding arms 12 and 13 in acertain position and a certain distance apart, and, as shown in dottedlines in Fig. 2 and in full lines in Fig. 4, such position being theirnormal one.

Bracket 18, which carries this entire device may be secured in' anysuitable way. I prefer, however, to attach it to the support or tableupon which the lumber rests while being manipulated. This tableconsists, preferably, of two sections 27, with a gap between them, inwhich the implement may be swung for adjustment and manipulated for use,as best shown in Figs. 1 and 2. The tops of these table-sections mayconsist of rollers 28 to facilitate the moving and sliding of thelumber, (indicated at 29.) Bracket 18 may be arranged and connected in amanner in which it also serves to connect the two table-sections for thepurpose ,of holding them in their proper relative position withreference to each other. This connection may by aided by additionalbraces 31.

The use of the device is as follows: Apiece of lumber 29, which is to becut up for any purpose or for so-called dimension7 stuff of certainfixed sizes and the cutting-lines for which purpose are to be marked onit, is thrown upon the table. Itis further presumed that the pieces tobe gained from cutting up such larger piece should be clear of all orcertain defects on both sides, which requires that the marks which areto indicate cutting lines should be run accordingly. To do thissuccessfully requires that all defects on both sides of the board besimultaneously before the operator for observation. For such purpose Iproceed by moving the piece of lumber until the first defective spot onthe upper side is between the gap of the table. The upper point 10 isnow lowered against sideAof the lumber, and said point is run around thedefective spot, so as to properly locate and dene the same. This may bereadily done because the sliding head 15 and the swiveled box 16 permitsaid point to be freely moved over the board in all directions. Thelowering of point 10 causes at the same time point 11 below to rise upand come in contact with the under surface B of the board, and saidpoints moving also together in a horizontal plane-that is, one followingthe other and point 11 pointing upwardly-it is clear that whatever linesare described by point 10 on surface A will be exactly reproduced bypoint 11 on surface B. In this manner all defects on side A are tracedand by copy are transferred onto side B, so that when the board ispresently turned over4 to bring side B up this latter will show its owndefects, and in addition it will also show the defects of the other sideby the copies of their tracings and which occupy a position exactly likethe one of the corresponding real defect on the other side. The linesand marks to indicate the lines on which the board is to be cut andsubdivided may now be intelligently arranged and run, because alldefects are simultaneously before the operator. For so running thesemarking-lines other means are used, and as far as this particular boardis concerned the use of my implement terminates, except, perhaps, table27 might be used to support the board at that time. For running suchmarking-lines independent means like rules, gages, straightedges, Sac.,are used, or my marking-machine, as described in the patent mentioned,may be employed for such purpose. Since point 10 is merely used as atracer and not as a transferrer,it need not be a pencil, but may besimply a steel point. I prefer, however, to use a pencil, so as to showexactly to the operator what he is transferring on the other side,thuspreventing omissions and mistakes.

All or part of the lower arm 1 3 is prefer- TOO IIO

ably elastic, so as to be free to exert a slight pressure to maintainthe pencil or chalk in marking contact and follow any unevenness in thesurface of the board. I do this by, attaching a piece of steel 32 tothis arm, vwhich carries holder 14 for lower point or pencil l1. Theraising or lifting of this arm 13 may also be assisted by'a spring 33,which supports its weight.

Having described my invention, I claim as newel. In a duplicatingdefect-tracer for the purpose described the combination of a tableconsisting of two parts with a gap between them, two points, one being atracer and the other a transferrer, a frame supported in the gapmentioned and on which these points are carried, a spring operating tohold them normally a fixed distance apart and means operativelyconnecting them in a manner that if one is moved toward the other thislatter is caused to move also, approaching the moved point, while if oneis moved in a direction at right angles to the movement first mentioned,the other is caused to follow the moved point, both moving then togetherat a maintained distance apart.

2. In a duplicating defect-tracer for the purpose described, thecombination of a tracing and a transfer point, a support whereby thematerial may be held between these two points, arms, at one end of eachof which these points are carried, one being arranged below the other, asupport to which the other ends of each of these arms are attached, saidsupport being pivotally mounted whereby the y two arms may be swungsimultaneously about in a horizontal plane and means connecting the armsto each other and operating so that if one arm is moved in a verticaldirection the other is causedto move also vertically but oppositethereto.

3. In a duplicating defect-tracer for the purpose described, thecombination of a tracer and a transfer point, an arm for each at one endof which it is carried, a sliding head to which the other end of each ofthese arms is hinged, a push-rod supported in this sliding head, linksconnecting it to these arms, a spring operating in a manner to normallykeep the free ends of these arms apart, a swiveled bearing for thesliding head and means to support lumber in a manner that it may occupya position between the tracer and transfer point, the operation beingsuch that when the tracer-point is caused tobear against one side of thematerial, the transfer-point comes automatically in contact with theother side of this material after which, when one point is moved, theother follows automatically over the material.

In testimony whereof I hereunto set my signature in the presence of twowitnesses.

EDWIN M. SCHANTZ.

Witnesses:

(1. SPENGEL, v

ALBERT H. MonBUs.

